jQuery.each() usage sharing_jquery

$.each ( [0,1,2], function(i, n){
alert( "Item #" i ": " n );
});

$ .each( { name: "John", lang: "JS" }, function(i, n){
alert( "Name: " i ", Value: " n );
});

$.each($("input:hidden"), function(i,val){
alert(val); //Output [object HTMLInputElement] because it is a form element.
alert(i); //The output index is 0, 1, 2, 3
alert(val.name); //Output the value of name
alert(val.value); //Output value The value of Iteration method can be used to iterate objects and arrays.

Unlike the $().each() method that iterates over jQuery objects, this method can be used to iterate over any object. The callback function has two parameters: the first is the member of the object or the index of the array, and the second is the corresponding variable or content. If you need to exit the each loop, you can make the callback function return false, and other return values ​​will be ignored.